Fuel deflecting mechanism



13mg, :3, 1937. M. F. ROBERTSON 2,088,925

FUEL DEFLECTING MECHANISM Filed March '7, 1953 2 Sheets-Sheet 1 I s v/.FL 4 INVENTOR.

Mar tonfRober tson ATTORNEY.

Aug. 3, W3? M. F. ROBERTSON 2,@88,925

FUEL DEFLECTING MECHANISM Filed March 7, 1935 2 Shets-Sheet 2 1INVENTOR. 30 flo/"tonffiobentson .7 BY I E4 5 {m ATTORNEY.

Patented Aug. 3, 1937 Morton F; Robertson, Chattanooga, Tenn; as-

Signor, by mesne assignments, to The Standard Stoker Company, Inc.,corporation of Delaware New York, N. Y., a i

Application March '7, 1933, Serial No. 659921 This inventionjflrelatesgenerally toa firebox constructionandparticularly to the firebox of alocomotive, thefiring opening-of which is pro- .vided with a fueldeflecting memb'er above the path of the introduced fueland firedoor,and it is an objector the invention to provide an arrangement wherebythe deflecting member forms a shield for the fire door'against the heatof thefirein the firebox.

More specifically it is an object of the invention to provide a fireboxhaving a firing opening with a-fuel" casing communicating with the lowerportion of the opening, a fire door for the upper portionof the opening,a fuel deflecting member movably mounted in said opening above the pathoi -the introduced fuel'and means for actuating thefire door and thedeflecting memb913, 1-. i

It is another object of the invention to provide, in a structure of the:type described, an arrangementfor' simultaneouslyopening the fire doorand moving the deflecting member to a position where it will notobstruct-the firing opening, and

for simultaneously closing the fire door andmoving thedeflecting memberto its operative position. at

:;Further= objects of the invention reside in the details ofconstruction of the deflecting member, the fire door and other parts,and the novel arrangement and combination of the parts as'will appearfrom the following description when read in conjunction with thedrawings, in which Figure 1 is a vertical longitudinal section through aportion of the rearward end of a. locomotive showing the inventioninelevation, with parts broken away, applied to the firebox of thelocomotive;

Figure 2 Ba view of the structure of Figure l inrear elevation; and

Figure 3, is a sectional view 33 of Figure 1.

Figure 4 is a sectional 4-4 of Figure Figure'5 is a sectional view takenon the line 5-7-5-5 of Figure'2. l

- Throughout the description, the term forward is used to denote thegeneral direction in View taken on the line which fuel passes throughthe stoker into-the'firedrawings, the invention is illustrated asapplied to arlocomotive boilerhaving a backwall or rear water leg; Illwith a firebox; opening ll theretaken on the: line According to theconstruction shown in the V l a 9 Claims. (01. no 101) the fireboxopening- I-l. Suitable means is provided for d'ischarging fuel to orinto the lower portion of the firebox opening-as for example, by astoker designated generally by thenumeral I 3; The stoker' l3'includes afuel casing l l communicating \m'th the lower portion of the fireboxopeningll. I i The upper portion of the firebox opening, above thecasing I4, is provided with an arched door frame l5 -on which is mounteda firedoor 16 comprising the door members llwhich meet upon the verticalcenter line of the fireboxopening and are pivoted upon pins l8 to swinglaterally and vertically. The door members I"! when open permit handfiring of fuel and permit the insertion of a hook or poker throughthefirebox opening when raking or cleaning the fire.

Suitable means is provided for scattering fuel over the fire, and in thepresent instance there is shown a distributor plate [9 over which fuelis projected by pressure fluid issuing from a distributor head 20"located at the rear of the distributor plate I9. In scattering fuel overthe firebedv in a firebox, particularly. over the firebed of alocomotive firebox, a comparatively large amount of fuel particles arecarried through the stack unconsumed, causing, not only a veryappreciable economic loss but also creating a nuisance by reason of thefact that the unconsumed particles are carried back into the coaches anddeposited along. the right of way. To overcome these sources of economicloss and annoyance, the use of top deflectors which tend to hold thefuelidown closer to the firebed where they will be consumed,-has beenproposed.

These difficulties have been overcome in a large measure by the use oftop deflectors in conjunction with a distributor plate. However, in someof such constructions the top deflector has interfered with the use of ahook or poker in raking or cleaning the fire. In my construction whenthe fire door is opened preparatory to raking or cleaning the fire, thedeflecting member 2 1! is arranged to be automatically raised about apivot adjacent the top outer marginal edge of the'firebox to a positionadjacent the upper marginalwedge of the firebox opening, providing anunobstructed opening sufficiently large toper mit-theinsertion of a hookor. poker therethrough. The firedoors Il may: be operated by a fluidpressure apparatus comprising acylinder 22, containing a piston 5 3-foractuating the doors l1,-

and a valve casing 23, containing a valve member- 24- for controllingthe admission .of fluid to the pipe 25, and thepcylinder; 22 fromgjtheline 26.

rant of one of the doors and engages a pin 52 at its other end. The pin52 extends through a slot in the wall of the cylinder 22 and is mountedin the piston 53. Admission of fluid pressure to the pipe 25 causes thepiston 53 tomove toward the open end of the cylinder. Like movement isgiven to the quadrant 50 and the firedoors- I! are caused to swing openabout the pins l8. The valve casing 23 is securely fastened to thevalve. casing 21 in a suitable manner, as by the bolts 28 passingthrough the flange 29 and the valve casing 21 in turn is securelyfastened tothe fiange: 30 of the stoker discharge casing M by suitable.

means, as by the bolts 3| passing through the flange 32.

Normally, the valve member 24 is seated, as.

shown in Figure 3, against the pressure of the fluid in the line 26 bythe pressure of thespring.

33. In this position no pressure fluid is admitted through the pipe 25to the cylinder 22 and the doors remain closed. When it is desired toopen the doors I1 in order to rake the fire or for any other reason, thetreadle 34 is depressed, which, through the arms 35 and 36, raises thevalve member 24 against the pressure of the spring 33. With the valvemember 24 in its raised position, pressure fluid passes from the line26, through the pipe 25 to the cylinder 22 opening the door members Atthe same time that pressure fluid passes from the line 26 to the pipe 25to open the door members pressure fluid also passes through the port 31depressing the piston 38 to its lower most position in the casing 21.The movement of the piston 38 is transmitted to the piston-rod 39 whichin turn raises the deflecting member 2| to a position adjacent the uppermarginal edge of the firebox opening through the link 40 and arm 4|.When the fireman removes his foot from the treadle 34, the valve member24 is lowered by 50, the pressure of the spring 33, thereby cutting offthe supply of pressure fluid to the pistonsoperating the door members I!and deflecting member 2|, respectively. Since the door members I! arehinged at their upper ends and the deflecting 55 member 2| is pivoted atits rearward end, the

overhanging weight of the doors causes them to close and the overhangingweight of the deflecting member causes it to drop back into itsoperative position in the firing opening.

6) The deflecting member 2| comprises the hollow flat plate-like forwardportion 42 slightly less in width than the width of the firing opening,and a hollow rearward portion 43, of lesser width than the forwardportion 42, formed with the 5 transversely extending tubular shaft 44. Apair of aligned bearings 45 and 46 are preferably formed integral withand at the opposite upper sides of the top of the firedoor arch |5. The

tubular shaft 44 is in alignment with the bear- 70 ings 45 and 46 and ahollow shaft 41 extends 75 ing between the hollow rearward portion 43and Alink 5| isattached at one end to the upper endof the quadthetubular shaft 44 of the deflecting member 2| is provided with aplurality of perforations 48 to permit the introduction of air throughthe hollow shaft 41 into the hollow deflecting member 2|.;-, ,Thedeflecting member 2| is provided with perforations 49 through which airis drawn into the furnace by the draft in the firebox, thus a continuousstream of cool air passes through the deflecting member, materiallyincreasing the life thereof and providing a source of air for effectingcomplete combustion of the fuel in the firebox.

The deflecting member also functions as a shield for the firedoorprotecting it from the intense heat of the fire and may be employed assuch in furnaces arranged for stoker or manual firing of fuel.

I claim:

1. In combination'with a firebox having a firing opening, a fuel casingcommunicating with the lowerportion of said opening, means forprojecting fuelforwardly therefrom into said fireb0x,-a firedoor for theupper portion of said opening, a fuel deflecting member pivotallymounted at its rearward end and extending into said firebox and abovethe horizontal plane of the fuel projecting means, said fuel deflectingmember being normally in a fixed position in the firing opening abovethe horizontal plane of the fuel projecting means, a pressure fluidoperated piston for opening said fire door, a pressure fluid operatedpiston for raising said deflecting member about its pivotally mountedend, valvular means for simultaneously admitting pressure fluid tooperate said pistons for opening said firedoor and raising saiddeflecting member, the

closureof said valvular means permitting the simultaneous closure ofsaid firedoor and the return of said fuel deflecting member to itslowered position.

2. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said opening, means forprojecting fuel forwardly therefrom into said firebox, a projected fueldeflecting member above the horizontal plane of the fuel projectingmeans and above the path of the fuel stream pivotally mounted at itsrearward end, said fuel deflecting member being normally in a fixedposition in the firing opening above the horizontal plane of the fuelprojecting means, a firedoor for the upper portion of said firingopening, a fluid actuated piston, connections from said piston to saiddoor for opening the same, a second fluid actuated piston, connectionsfrom said last named piston to said deflecting member for raising thesame about its pivotally mounted end, valvular means for simultaneouslyadmitting pressure fluid to said pistons for opening said firedoor andraising said deflecting member, the closure of said valvular meanspermitting the simultaneous closure of said firedoor and the return ofsaid fuel deflect ing member to its lowered position.

3. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said opening, means forprojecting fuel forwardly into said firebox in aerial paths,'a fueldeflecting member above the path of the projected fuel stream arrangedfor movement towards and away from such path, said fuel deflectingmember being normally in a fixed position in the firing opening abovethe horizontal plane of the fuel projecting means, a firedoor for theupper portion of said firing opening, fluid pressure actuating means formoving said defleeting member and fluidpressure actuating lneans foropening said firedoor, and valvular means for simultaneously admittingfluid to and simultaneously interrupting admission of fluid to saidactuating means.

4. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said firing opening, adistributor plate mounted in said firing opening for receiving fuel fromsaid fuel casing, means at the rear of said plate arranged to projectfuel thereover, and a hollow fuel deflecting member positioned abovesaid distributor plate and mounted to swing upwardly about its rearwardend, said deflecting member having a plurality of spaced openings at itsforward end, said rearward end having an atmospheric opening whereby acurrent of air may be admitted to said deflecting member through saidopen rearward end and exhausted through said spaced openings.

5. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said opening, means forprojecting fuelforwardly into said firebox in aerial paths, and a hollowfuel deflecting member pivotally mounted at its rearward end adjacentthe outer upper marginal edge of said firing opening above thehorizontal plane of the fuel projecting means and extending downwardlyand forwardly through said opening above the path of the projected fuel,said deflecting member having a plurality of spaced openings at itsforward end, said rearward end having an atmospheric opening whereby acurrent of air may be admitted to said deflecting member through saidopen rearward end and exhausted through said spaced openings.

6. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said opening, means forprojecting fuel forwardly into said firebox in aerial paths, a firedoorframe embracing the upper portion of said firing opening, a firedoormounted upon said frame, horizontal bearings formed with said frame, ahollow shaft pivotally mounted in said bearings and having its endsopening to atmosphere, and a hollow fuel deflecting member above thepath of the fuel on said hollow shaft, said deflecting member beingprovided with a plurality of spaced openings and said hollow shaft beingprovided with a plurality of spaced openings communicating with theinterior of said hollow deflecting member whereby a current of air maybe admitted to said deflecting member through said hollow shaft andexhausted through said spaced openings.

'7. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said opening, means for projecting fuel forwardly into said firebox in aerial paths, a hollow fueldeflecting member above the horizontal plane of the fuel projectingmeans and above the path of the fuel arranged for upward swingingmovement about a pivot at its rearward end, said deflecting memberhaving a plurality of spaced openings and an open rearward end whereby acurrent of air may be admitted to said deflecting member through saidopen rearward end and exhausted through said spaced openings, a firedoorfor the upper portion of said firing opening, a fluid actuated piston,connections from said piston to said door for opening the same, a secondfluid actuated piston, connections from said piston to said deflectingmember for raising the same, and valvular means for simultaneouslyadmitting fluid to said fluid actuated pistons.

8. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said firing opening, means forprojecting fuel forwardly into said firebox in aerial paths, a firedoorframe embracing the upper portion of said firing opening, a firedoor forthe upper portion of said firing opening mounted upon said frame,horizontal bearings formed with said frame, a hollow shaft mounted insaid bearings, a hollow fuel deflecting member above the horizontalplane of the fuel projecting means and above the path of the projectedfuelon said hollow shaft and arranged for movement about the axis ofsaid shaft, said deflecting member being provided with a plurality ofspaced openings and said hollow shaft being provided with a plurality ofspaced openings communicating with said hollow deflecting member wherebya continuous current of air may pass through said hollow shaft and saiddeflecting member from without the firebox into the firebox, and meansfor simultaneously opening said door and raising said deflecting member,said means permitting the simultaneous closure of said firedoor and thereturn of said deflecting member to its lowered position upon itsrelease from said opening and raising actions.

9. In combination with a firebox having a firing opening, a fuel casingcommunicating with the lower portion of said firing opening, means forprojecting fuel forwardly into said firebox in aerial paths, a firedoorframe embracing the upper portion of said firing opening, a firedoor forthe upper portion of said firing opening mounted upon' said frame,horizontal bearings formed with said frame, a hollow shaft mounted insaid bearings, a hollow fuel deflecting member above the horizontalplane of the fuel projecting means and above the path of the fuel, onsaid hollow shaft and arranged for movement in a vertical plane aboutthe axis of said shaft, said deflecting member being provided with aplurality of spaced openings and said hollow shaft being provided with aplurality of spaced openings communicating with the interior of saidhollow deflecting member whereby a current of air may pass through saidhollow shaft and said deflecting member into the firebox, a fluidactuated piston, connections from said piston to said door for openingthe same, a second fluid actuated piston, connections from said lastnamed piston to said deflecting member for raising the same, andvalvular means for admitting fluid to said fluid actuated pistons.

MORTON F. ROBERTSON.

